Guest ChargePro 2720A
#10 in 1 and 2 bankFull review
For a two battery boat on lead acid batteries that wants 10 A a bank for little money. It has no lithium mode.
Amazon $182.64$182.64
3.2/5
For a two battery boat that wants ignition protection and smarter current sharing than a fixed split charger.
- 2 x 6 AOutput
- 12 ATotal current
- YesLithium mode
- IP67Water rating
Check price at Amazon$201.30
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Distributed-On-Demand sends a full starting battery’s unused amps to the drained trolling battery, so it finishes sooner
- IP67 case built to ABYC A-31 with ignition protection
- LiFePO4, AGM, gel and flooded profiles
Cons
- Lithium mode only covers ProMariner approved batteries
- Charge gauge shows overall progress, not each battery’s level
- 3 year warranty, against 5 on ProMariner’s own ProTournament line
The ProMariner ProSport HD family
Every ProMariner ProSport HD model we rank, smallest first. Ratings compare each against its own bank count.
| Model | Output | Rating | Price |
|---|---|---|---|
| ProMariner ProSport HD 6 | 1 x 6 A | 2.8/5 | $135.99 |
| ProMariner ProSport HD 8 | 8 A total | 2.9/5 | $169.99 |
| ProMariner ProSport HD 12 (this one) | 2 x 6 A | 3.2/5 | $201.30 |
| ProMariner ProSport HD 20 | 20 A total | 3.5/5 | $249.99 |
| ProMariner ProSport HD 20 Plus | 20 A total | 3.3/5 | $255.63 |
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its bank count. How we rank explains each one.
Specifications
| Model number | 44012 |
|---|---|
| Charging | |
| Banks | 2 |
| Current per bank | 6 A |
| Total current | 12 A |
| Lithium mode | Yes |
| AGM mode | Yes |
| Build | |
| Water rating | IP67 |
| Display or app | No |
| Ignition protected | Yes |
| Weight | 6 lb |
| Warranty | 3 years |
| Released | 2021-01-25 |
Alternatives in this bank count
Minn Kota MK-106PCL
#11 in 1 and 2 bankFull review
For a single starting or small trolling battery, lead acid or lithium, on a small boat. Pick the 10 A version for a big deep cycle battery.
Amazon $110.99$110.99
ProMariner ProSport HD 8
#13 in 1 and 2 bankFull review
For a small boat with a starting battery and a modest trolling battery, from a maker whose chargers are built for engine compartments.
Amazon $169.99$169.99
Compare
Compare the ProMariner ProSport HD 12 with any other onboard marine battery charger →
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